Mini COOPER S Workshop Manual

1

Chapter 1

Routine maintenance and servicing

Air cleaner element renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Air pump drivebelt check and renewal . . . . . . . . . . . . . . . . . . . . . . . 9

Bodywork, paint and exterior trim check . . . . . . . . . . . . . . . . . . . . . . 28

Brake fluid renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Carburettor idle speed and mixture adjustment . . . . . . . . . . . . . . . . 26

Clutch hydraulic check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Clutch return stop adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Contact breaker points check and adjustment . . . . . . . . . . . . . . . . . 20

Control box cleaning and inspection . . . . . . . . . . . . . . . . . . . . . . . . . 24

Coolant renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Distributor cap, rotor arm and HT lead check . . . . . . . . . . . . . . . . . . 32

Distributor lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Door, boot and bonnet check and lubrication . . . . . . . . . . . . . . . . . . 27

Driveshaft gaiter check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Drum brake adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Dynamo check and lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Emission control equipment check . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Engine/transmission oil and filter renewal . . . . . . . . . . . . . . . . . . . . . 13

Exhaust system check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fan belt check and renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Front brake wear check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Fuel filter renewal (fuel injection models) . . . . . . . . . . . . . . . . . . . . . . 37

Fuel system components, checks and lubrication . . . . . . . . . . . . . . 19

Handbrake check and adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Headlight beam alignment check . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Ignition timing check and adjustment . . . . . . . . . . . . . . . . . . . . . . . . 25

Intensive maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Rear brake wear check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Road test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Seats and seat belt check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Spark plug renewal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Steering and suspension check . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Steering and suspension lubrication . . . . . . . . . . . . . . . . . . . . . . . . . 16

Underbody and fuel/brake line check . . . . . . . . . . . . . . . . . . . . . . . . 6

Underbonnet check for fluid leaks and hose condition . . . . . . . . . . . 18

Valve clearance adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

1•1

Contents

Easy, suitable for

novice with little

experience

Fairly easy, suitable

for beginner with

some experience

Fairly difficult,

suitable for competent

DIY mechanic

Difficult, suitable for

experienced DIY

mechanic

Very difficult,

suitable for expert DIY

or professional

Degrees of difficulty

5

4

3

2

1

1•2 Servicing specifications

Lubricants and fluids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to end of “Weekly Checks”

Capacities

Engine oil with filter change

Manual transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8 litres

Automatic transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 litres

Engine oil without filter change (approximate)

Manual transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 litres

Automatic transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 litres

Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 litres

Fuel tank

Saloon and Clubman (approximate):

Early models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 litres

Later models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 litres

Estate, Van and Pick-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 litres

1275 GT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 litres

Cooper S Mk III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 litres

Engine

Oil filter type:

Pre-1973 models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X101 (cartridge type)

1974-on models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion C103 (canister type)

Cooling system

Fan belt adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.0 mm deflection of belt between crankshaft and dynamo/alternator

pulleys

Specified antifreeze mixture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30% antifreeze/70% water

Note: Refer to Chapter 3 for further details.

Fuel system - carburettor models

Air cleaner element type:

Pre-1973 models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion W131

1974-on models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion W125

1990-on 1275 cc models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion W250

Fuel system - fuel injection models

Air cleaner element type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion type not available

Fuel filter type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion type not available

Exhaust and emission control systems

Air pump drivebelt adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13.0 mm deflection of belt between pulleys

Ignition system

Spark plugs:*

Type:

All models up to 1987 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion RN9YCC or RN9YC

998 cc engine models, 1987 to 1989 . . . . . . . . . . . . . . . . . . . . . . . Champion N12YCC or N12YC

998 cc engine models (1989-on) . . . . . . . . . . . . . . . . . . . . . . . . . . Champion RN12YCC or RN12YC

1275 cc engine models (1990-on) . . . . . . . . . . . . . . . . . . . . . . . . . Champion RN9YCC or RN9YC

Electrode gap:

All Champion plug types except RN9YC and N12YC . . . . . . . . . . 0.8 mm

Champion RN9YC and N12YC . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.6 mm

HT leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion LS-02, boxed set

*Spark plug types and electrode gaps are as recommended by Champion Spark Plug. If alternative plugs are used, refer to their manufacturer’s

recommendations.

Clutch

Clutch return stop clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.50 mm

Brakes

Minimum brake shoe lining thickness . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 mm

Minimum brake pad thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 mm

Handbrake lever travel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 clicks of ratchet

Tyres

Tyre pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See “Weekly checks”

Torque wrench settings Nm lbf ft

Engine/transmission oil drain plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 25

Spark plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 18

Roadwheel nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 45

Maintenance schedule 1•3

1

Every 250 miles (400 km) or weekly

mmRefer to “Weekly Checks”

Every 3000 miles (5000 km) or

3 months, whichever comes first

In addition to the items listed above, carry out the following:

mmAdjust the front and rear drum brakes (Section 3)

mmCheck the operation of the handbrake and adjust if

necessary (Section 4)

mmCheck the condition and security of the steering

and suspension components (Section 5)

mmInspect the underbody and the brake hydraulic

pipes and hoses (Section 6)

mmCheck the condition of the fuel lines (Section 6)

mmCheck the condition and security of the exhaust

system (Section 7)

mmCheck the condition of the fan belt and renew if

necessary (Section 8)

mmCheck the condition of the air pump drivebelt

(where applicable) and renew if necessary

(Section 9)

mmInspect the clutch hydraulic components

(Section 10)

mmCheck the condition of the seats and seat belts

(Section 11)

mmCheck the headlight beam alignment (Section 12)

Every 6000 miles (10 000 km) or

6 months, whichever comes first

In addition to the items listed above, carry out the following:

mmRenew the engine/transmission oil and filter

(Section 13)

mmCheck the condition of the front brake shoes and/or

pads, and renew if necessary (Section 14)

mmCheck the condition of the driveshaft gaiters

(Section 15)

mmLubricate the suspension and steering grease

points (Section 16)

mmCheck the condition of the rear brake shoes and

renew if necessary (Section 17)

mmCheck all underbonnet components and hoses for

fluid leaks (Section 18)

mmCheck and if necessary top up the carburettor

piston dashpot and lubricate the linkage

(Section 19)

Every 6000 miles (10 000 km) or

6 months, whichever comes first

(continued)

mmCheck the condition of the contact breaker points

and adjust or renew (Section 20)

mmLubricate the distributor (Section 21)

mmCheck and if necessary adjust the clutch return

stop (Section 22)

mmLubricate the dynamo bearing - early models

(Section 23)

mmClean and inspect the dynamo charging system

control box (Section 24)

mmCheck and if necessary adjust the ignition timing

(Section 25)

mmCheck and if necessary adjust the carburettor idle

speed and mixture settings (Section 26)

mmLubricate the locks and hinges (Section 27)

mmCheck the condition of the exterior trim and

paintwork (Section 28)

mmRoad test (Section 29)

Note: Renewal of the engine/transmission oil and filter at this service

interval is only necessary on pre-1985 models. On all other models,

oil and filter renewal is recommended at 12 000 miles/12 months.

Every 12 000 miles (20 000 km) or

12 months, whichever comes first

In addition to the items listed above, carry out the following:

mmRenew the air cleaner element (Section 30)

mmCheck and if necessary adjust the valve clearances

(Section 31)

mmInspect the distributor cap, rotor arm and HT leads

(Section 32)

mmRenew the spark plugs (Section 33)

mmCheck the emission control equipment (Section 34)

Every 24 000 miles (40 000 km) or

twenty four months, whichever

comes first

In addition to the items listed above, carry out the following:

mmRenew the coolant (Section 35)

mmRenew the brake fluid (Section 36)

mmRenew the fuel filter - fuel injection models

(Section 37)

The maintenance intervals in this manual

are provided with the assumption that you,

not the dealer, will be carrying out the work.

These are the average maintenance intervals

recommended by the manufacturer for

vehicles driven daily under normal conditions.

Obviously some variation of these intervals

may be expected depending on territory of

use, and conditions encountered. If you wish

to keep your vehicle in peak condition at all

times, you may wish to perform some of these

procedures more often. We encourage

frequent maintenance because it enhances

the efficiency, performance and resale value

of your vehicle.

If the vehicle is driven in dusty areas, used

to tow a trailer, driven frequently at slow

speeds (idling in traffic) or on short journeys,

more frequent maintenance intervals are

recommended.

1•4 Maintenance - component location

Underbonnet view of a 998 cc Mini 1000 Saloon

1 Brake master cylinder reservoir

2 Clutch master cylinder reservoir

3 Fuse block

4 Carburettor piston damper

5 Air cleaner

6 Windscreen wiper motor

7 Radiator pressure cap

8 Engine/transmission oil filler cap

9 Alternator

10 Engine/transmission oil dipstick

11 Distributor

12 Ignition coil

13 Vehicle identification plate

14 Clutch slave cylinder

15 Windscreen washer reservoir

Maintenance - component location 1•5

1

Underbonnet view of a 1275 cc Mini Cooper Saloon

(air cleaner removed for clarity)

1 Alternator

2 Ignition coil

3 Engine/transmission oil dipstick

4 Engine management (fuel

injection/ignition) ECU

5 Radiator pressure cap

6 Brake fluid reservoir cap

7 Brake system vacuum servo unit

8 Relay module

9 Fuel cut-off inertia switch

10 Manifold absolute pressure (MAP)

sensor fuel trap

11 Fuel return pipe

12 Fuel feed pipe

13 Accelerator cable

14 Throttle body assembly

15 Heater coolant valve

16 Charcoal canister purge valve

1•6 Maintenance - component location

Front underside view of a 998 cc Mini 1000 Saloon

1 Engine/transmission oil drain plug

2 Oil filter

3 Front suspension tie-bar

4 Disc brake caliper

5 Driveshaft outer CV joint

6 Front subframe

7 Subframe rear mounting

8 Offset sphere type inner CV joint

9 Gearchange extension rod

10 Battery positive cable

11 Steering tie-rod outer balljoint

12 Lower suspension arm

13 Exhaust bracket

Maintenance - component location 1•7

1

Rear underside view of a 998 cc Mini 1000 Saloon

1 Rear subframe

2 Rear brake wheel cylinder attachment 3 Exhaust rear silencer

4 Battery box

5 Exhaust mounting

6 Handbrake cable guide

7 Battery positive cable

1 Introduction

1This Chapter is designed to help the home

mechanic maintain his/her vehicle for safety,

economy, long life and peak performance.

2This Chapter contains a master

maintenance schedule, followed by Sections

dealing specifically with each task in the

schedule. Visual checks, adjustments,

component renewal and other helpful items

are included. Refer to the accompanying

illustrations of the engine compartment and

the underside of the vehicle for the locations

of the various components.

3Servicing your vehicle in accordance with

the mileage/time maintenance schedule and

the following Sections will provide a planned

maintenance programme, which should result

in a long and reliable service life. This is a

comprehensive plan, so maintaining some

items but not others at the specified service

intervals will not produce the same results.

4As you service your vehicle, you will

discover that many of the procedures can -

and should - be grouped together, because of

the particular procedure being performed, or

because of the close proximity of two

otherwise-unrelated components to one

another. For example, if the vehicle is raised

for any reason, the exhaust should be

inspected at the same time as the suspension

and steering components.

5The first step of this maintenance

programme is to prepare yourself before the

actual work begins. Read through all the

Sections relevant to the work to be carried

out, then make a list and gather together all

the parts and tools required. If a problem is

encountered, seek advice from a parts

specialist or a dealer service department.

2 Intensive maintenance

1If, from the time the vehicle is new, the

routine maintenance schedule is followed

closely, and frequent checks are made of fluid

levels and high-wear items, as suggested

throughout this manual, the engine will be

kept in relatively good running condition, and

the need for additional work will be minimised.

2It is possible that there will be some times

when the engine is running poorly due to the

lack of regular maintenance. This is even more

likely if a used vehicle, which has not received

regular and frequent maintenance checks, is

purchased. In such cases, additional work

may need to be carried out, outside of the

regular maintenance intervals.

3If engine wear is suspected, a compression

test (refer to Chapter 2A) will provide valuable

information regarding the overall performance

of the main internal components. Such a test

can be used as a basis to decide on the

extent of the work to be carried out. If, for

example, a compression test indicates serious

internal engine wear, conventional

maintenance as described in this Chapter will

not greatly improve the performance of the

engine, and may prove a waste of time and

money, unless extensive overhaul work

(Chapter 2B) is carried out first.

4The following series of operations are those

often required to improve the performance of

a generally poor-running engine:

Primary operations

a) Clean, inspect and test the battery (See

“Weekly checks”).

b) Check all the engine-related fluids (See

“Weekly checks”).

c) Check and if necessary adjust the valve

clearances (Section 31).

d) Check the condition of the fan belt

(Section 8).

e) Top up the carburettor piston damper

(Section 19)

f) Check the condition and adjustment of

the contact breaker points (Section 20).

g) Inspect the distributor cap, rotor arm and

HT leads (Section 32).

h) Renew the spark plugs (Section 33).

i) Check and if necessary adjust the ignition

timing (Section 25).

j) Check the condition of the air cleaner

filter element and renew if necessary

(Section 30).

k) Check and if necessary adjust the

carburettor idle speed and mixture

settings (Section 26).

l) Renew the fuel filter - fuel injection

models (Section 37).

m)Check the condition of all hoses, and

check for fluid leaks (Section 18).

5If the above operations do not prove fully

effective, carry out the following operations:

Secondary operations

All the items listed under “Primary

operations”, plus the following:

a) Check the charging system (Chapter 5A).

b) Check the ignition system (Chapter 5B).

c) Check the fuel system (Chapter 4A and B).

d) Renew the distributor cap and rotor arm

(Section 32).

e) Renew the ignition HT leads (Section 32).

3 Drum brake adjustment

2

1As wear takes place on the brake shoe

friction material, the clearance between the

friction material and the inner circumference

of the brake drum will increase, resulting in

excessive brake pedal travel before the

brakes are applied. To compensate for this,

adjusters are provided at the rear of each

brake backplate, enabling the clearance

between the brake shoe and drum to be kept

to a minimum.

2At the front two adjusters are fitted to each

brake backplate. At the rear a single adjuster

is located at the top of each brake backplate.

Front brakes

3Chock the rear wheels then jack up the

front of the car and support it on axle stands

(see “Jacking and vehicle support”).

4Each front brake has two adjusters of the

eccentric cam type, accessible from the rear

of each brake backplate. One of these

adjusters is located behind the steering arm

and insufficient clearance exists to enable an

ordinary brake adjusting spanner to be used.

Providing the adjuster is not excessively tight

or partially seized in the backplate, a 5⁄16 in AF

open-ended spanner can be used quite

successfully to turn the adjuster.

5Begin by turning one of the adjusters in the

forward direction of wheel rotation until the

wheel is locked (see illustration). Now back it

off slightly, until the wheel turns freely. The

brake drum may rub slightly in one or two

places as the wheel is turned. This is

acceptable providing the wheel does not bind.

Caution: If, when attempting to adjust the

brakes, the square-headed adjuster is

reluctant to turn, it is quite likely that it has

become seized in its housing. If this is the

case do not force it, or you will probably

break off the square head, necessitating

renewal of the complete backplate

assembly. Apply liberal amounts of

penetrating oil to the rear of the adjuster

and allow it to soak in. Now turn the

adjuster back and forth slightly, using

gentle force if necessary, increasing the

movement each time. When the adjuster

turns easily apply a multipurpose grease to

1•8 Maintenance procedures

Every 3000 miles or 3 months

3.5 Adjusting one of the front brake

adjusters with a brake adjusting spanner

the exposed portion of the adjuster at the

rear of the backplate and then turn it

through its entire travel. Preferably do this

with the brake drum removed.

6Turn the second adjuster also in the

direction of forward wheel rotation until the

drum locks again. Now back the adjuster off

until the wheel turns freely once more.

7Repeat this procedure for the other front

wheel and then lower the car to the ground.

Rear brakes

8Chock the front wheels then jack up the

rear of the car and support it on axle stands

(see “Jacking and vehicle support”). Ensure

that the handbrake is off.

9Using a brake adjusting spanner, turn the

square-headed adjuster in a clockwise

direction (viewed from the rear of the

backplate) until the wheel is locked (see

illustration). The adjusters on the rear brakes

are even more prone to seizure than those at

the front. If the adjuster is reluctant to turn

attempt to free it off as described above. If

this fails, remove the rear brake drums and

brake shoes as described in Chapter 9, and

clean and lubricate the adjuster thoroughly.

When all is well, refit the brake assemblies

and start the adjustment procedure again.

10 Now turn the adjuster back a quarter of a

turn at a time until the wheel turns freely

without binding. A slight rubbing may be felt

when the wheel is turned slowly, indicating a

high spot on the drum or dust on the linings.

This is acceptable providing the drum does

not bind.

11 Repeat this procedure for the other rear

brake then, before lowering the car to the

ground, check the handbrake adjustment as

described in the following Section.

4 Handbrake check and

adjustment

2

1Adjustment of the handbrake cables is

usually only necessary after high mileage

when a slight stretching of the cables will have

taken place, or if the cables have been

removed.

2Before adjusting the handbrake check that

the footbrake is correctly adjusted as

described in Section 3.

3Chock the front wheels then jack up the

rear of the car and support it on axle stands

(see “Jacking and vehicle support”).

4Apply the handbrake lever to the third notch

of the ratchet and check that the rear wheels

are locked. If not, adjust the handbrake as

follows.

5With the handbrake still applied to the third

click of the ratchet, tilt the front seats forward,

and on models having twin cables, tighten the

cable adjusting nuts at the base of the lever

until the rear wheels can only just be turned

by heavy hand pressure. On models having a

single front cable, slacken the locknut and

rotate the cable adjusting nut. When the

wheels can only just be turned by heavy hand

pressure, tighten the locknut (see

illustrations).

6Release the handbrake lever and ensure

that the wheels rotate freely. If satisfactory

lower the car to the ground.

5 Steering and suspension

check

2

Steering

1First check for wear in the steering tie-rod

outer balljoints. Turn the steering to left or

right lock sufficiently to allow the joints to be

observed. Now have an assistant turn the

steering wheel back and forth slightly. If there

is any side movement in the balljoint it must

be renewed. Similarly place your hand over

the rubber gaiter at the end of the rack

housing and feel for any excess free play of

the inner balljoint. If the condition of this joint

is suspect, a further investigation should be

carried out with the gaiter removed as

described in Chapter 10.

2Check the tightness of the steering column

clamp bolt at the base of the column. Any

slackness at this joint can also show up as

free play at the steering wheel.

Front suspension

3To inspect the front suspension, chock the

rear wheels then jack up the front of the car

and support it on axle stands (see “Jacking

and vehicle support”).

4Visually inspect the balljoint dust covers

and the steering gear gaiters for splits, chafing

or deterioration. Any wear of these

components will cause loss of lubricant,

together with dirt and water entry, resulting in

rapid deterioration of the balljoints or steering

gear.

5Grasp the roadwheel at the 12 o’clock and

6 o’clock positions and try to rock it. If any

movement is felt it is likely to be in one or

more of the following areas:

Hub bearings

6Continue rocking the wheel while your

assistant depresses the footbrake. If the

Every 3000 miles or 3 months 1•9

1

3.9 Adjusting the rear brakes

4.5a Handbrake adjustment on models with twin cables 4.5b Handbrake cable adjusting nut on models with a

single front cable

movement disappears or becomes less

severe, then the wheel hub bearings in the

swivel hub are at fault. Any perceptible

movement at all indicates wear in the hub

bearings, and they should be renewed as

described in Chapter 10.

Swivel hub balljoints

7Wear of the swivel hub balljoints is fairly

common on Minis and will be quite obvious

on inspection because the whole swivel hub

will appear to move in relation to the

suspension arms as the wheel is rocked. If

this is the case, the balljoints should be

adjusted, or if badly worn, renewed; these

procedures are contained in Chapter 10.

Suspension arm mountings

8Check for wear of the lower arm inner

mounting bushes where the arm is bolted to

the subframe. If the bushes are worn, the arm

will appear to move in and out as the wheel is

rocked.

9The upper arm inner roller bearings cannot

be inspected without partially dismantling the

suspension because the rubber cone spring

or displacer unit holds the arm in tension and

any wear will not be evident. It can be

removed for closer inspection if required as

described in Chapter 10; however, wear of the

upper arm and its bearings is uncommon.

10 With the brakes still firmly applied, try to

rotate the wheel back and forth. If any

movement is now felt, examine the tie-bar

between the lower suspension arm and

subframe for wear or deterioration of the

rubber bushes.

Rear suspension

11 To check the rear suspension for wear,

chock the front wheels then jack up the rear of

the car and support it on axle stands (see

“Jacking and vehicle support”).

12 Wear of the rear suspension components

can often be felt when driving the car as a

tendency for the rear of the vehicle to wander

over uneven road surfaces or when cornering.

To isolate the worn components, grasp the

roadwheel at the 12 o’clock and 6 o’clock

positions and try to rock it. If any movement is

felt, it is likely to be in one of the following

areas:

Hub bearings

13 Continue rocking the wheel while an

assistant depresses the footbrake. If the

movement disappears or becomes less

pronounced, then the bearings in the rear hub

are at fault. The bearings should be renewed if

there is any appreciable movement whatsoever.

Radius arm bearings

14 With the footbrake still applied, continue

rocking the wheel and observe the front of the

radius arm. If it can be seen to move

appreciably up and down, then wear has

taken place in the roller or plain bearing in the

radius arm, or on the pivot shaft. If this is the

case, the radius arm should be removed for

overhaul as described in Chapter 10.

6 Underbody and fuel/brake

line check

1

1With the vehicle raised and supported on

axle stands (see “Jacking and vehicle

support”), or over an inspection pit,

thoroughly inspect the underbody and wheel

arches for signs of damage and corrosion. In

particular, examine the bottom of the side

sills, and any concealed areas where mud can

collect. Where corrosion and rust is evident,

press and tap firmly on the panel with a

screwdriver, and check for any serious

corrosion which would necessitate repairs. If

the panel is not seriously corroded, clean

away the rust, and apply a new coating of

underseal. Refer to Chapter 11 for more

details of body repairs.

2At the same time, inspect the treated lower

body panels for stone damage and general

condition.

3Examine the subframes carefully,

particularly the side members of the rear

subframe. Corrosion here is a common

occurrence on Minis, particularly older

models, and is one of the main causes of

MOT test failure on these cars (see

illustration). Where corrosion has reached an

advanced stage, renewal of the subframe is

the only satisfactory cure.

4Inspect all of the fuel and brake lines on the

underbody for damage, rust, corrosion and

leakage. Also make sure that they are

correctly supported in their clips. The battery

positive cable which runs under the car from

front to rear is a common problem area as it is

prone to damage or chafing if not properly

routed or secured.

5Inspect the flexible brake hoses in the

vicinity of the backplates or front calipers,

where they are subjected to most movement

(see illustration). Bend them between the

fingers (but do not actually bend them double,

or the casing may be damaged) and check

that this does not reveal previously hidden

cracks, cuts or splits.

7 Exhaust system check

1

1With the engine cold (at least three hours

after the vehicle has been driven), check the

complete exhaust system, from its starting

point at the engine to the end of the tailpipe.

Ideally, this should be done on a hoist, where

unrestricted access is available; if a hoist is not

available, raise and support the vehicle on axle

stands (see “Jacking and vehicle support”).

1•10 Every 3000 miles or 3 months

6.3 Advanced state of corrosion on rear subframe side member 6.5 Inspect the flexible brake hoses in the vicinity of the

backplates

Wear in the rear hub bearings

can often be confirmed by

slowly turning the wheel with

your hand on the tyre. Worn

bearings usually exhibit a roughness

which can be felt as the wheel is turned.

2Check the pipes and connections for

evidence of leaks, severe corrosion, or

damage. Make sure that all brackets and

rubber mountings are in good condition, and

tight; if any of the mountings are to be

renewed, ensure that the replacements are of

the correct type. Failure of the rear mounting

rubber blocks on the rear subframe is a

common problem - check these carefully (see

illustrations). Leakage at any of the joints or in

other parts of the system will usually show up

as a black sooty stain in the vicinity of the leak.

3At the same time, inspect the underside of

the body for holes, corrosion, open seams,

etc. which may allow exhaust gases to enter

the passenger compartment. Seal all body

openings with silicone or body putty.

4Rattles and other noises can often be

traced to the exhaust system, especially the

rubber mountings. Try to move the system,

silencer(s) and catalytic converter. If any

components can touch the body or

suspension parts, secure the exhaust system

with new mountings.

8 Fan belt check and renewal

2

Note: If the car is fitted with exhaust emission

control equipment it will first be necessary to

remove the air pump drivebelt as described in

Section 9 to allow access to the fan belt.

Check and adjustment

1Release the three retaining lugs and remove

the engine ignition shield, if fitted. Rotate the

crankshaft so that the entire length of the fan

belt can be examined. On manual

transmission models, the engine can be

rotated quite easily by engaging top gear and

moving the car backwards or forwards to

allow the belt to be inspected. This should

only be done on level ground; and make sure

that the car cannot run away! An alternative

method, and the method that should be used

on automatic transmission models, is to press

the fan belt midway between the water pump

pulley and dynamo or alternator pulley and

then turn the fan blades.

2Examine the belt for cracks, splitting,

fraying or damage. Check also for signs of

glazing (shiny patches) and for separation of

the belt plies. Renew the fan belt if worn or

damaged.

3If the condition of the belt is satisfactory,

check the adjustment as follows.

4It is most important to keep the fan belt

correctly adjusted; If the belt is too loose it will

slip and wear rapidly, resulting in inefficient

operation of the water pump and dynamo or

alternator. If it is too tight, it will impose

excessive strain on the bearings of the water

pump, dynamo or alternator causing

premature failure of these components.

5The fan belt tension is correct when there

is 13 mm of fan belt deflection, using light

finger pressure, at a point midway between

the crankshaft and dynamo or alternator

pulleys.

6To adjust the fan belt, slacken the mounting

bolts of the dynamo or alternator, and also the

nut on the adjusting arm located below the

water pump (see illustration). Now move the

unit either in or out until the correct tension is

obtained. It is easier if the adjusting arm nut is

only slackened a little so it requires some force

to move the dynamo or alternator. In this way

the tension of the belt can be arrived at more

quickly than by making frequent adjustments.

If difficulty is experienced in moving the

dynamo or alternator away from the engine, a

long spanner or bar placed behind the unit and

resting against the block serves as a very good

lever and can be held in position while the

adjusting and mounting bolts are fully

tightened. When levering on an alternator, only

lever on the drive end or damage may occur.

7When the tension is correct, tighten the

adjusting arm nut first, followed by the

mounting bolts.

Renewal

8To remove the fan belt, slacken the two

dynamo or alternator upper mountings and

the nut on the adjusting arm below the water

pump (see illustrations).

Every 3000 miles or 3 months 1•11

1

8.6 Dynamo adjusting arm nut located

below the water pump

7.2a Exhaust front mounting block . . . 7.2b . . . and rear mounting block on rear

subframe

8.8a Dynamo mountings and adjustment points

1 Adjustment arm retaining nuts

2 Securing nut and bolt (rear) 3 Securing nut and bolt (front)

When checking the exhaust,

pay particular attention to the

mounting on the transmission.

Movement of the engine

causes this mounting to work loose,

causing an annoying squeak or rattle

when accelerating and decelerating.

Turning the engine will be

easier if the spark plugs are

removed first - see Section 33.

9Push the dynamo or alternator toward the

engine and lift the old belt off the three

pulleys. Feed the belt over each fan blade in

turn and withdraw it from behind the fan

cowling at the special gap just below the top

hose (see illustration).

10 Fit the new belt over the fan blades in the

same way and then place it in position on the

three pulleys.

11 Adjust the fan belt tension as described

previously then refit the air pump drivebelt,

where applicable, as described in the

following Section. Note:After fitting a new fan

belt, check and if necessary readjust the

tension after 250 miles (400 km).

9 Air pump drivebelt check

and renewal

2

Check and adjustment

1The checks and adjustment procedure for

the air pump drivebelt are basically the same

as described in Section 9 for the fan belt.

Adjust the tension of the drivebelt so that

there is 13 mm deflection of the belt, using

thumb pressure, at a point midway between

the two pulleys.

Renewal

2Release the three retaining lugs and remove

the engine ignition shield, if fitted.

3Undo and remove the two bolts securing

the radiator upper mounting bracket to the

radiator.

4Unscrew the radiator filler cap and slacken

the top hose securing clips. Carefully ease the

radiator as far as possible toward the wing

valance. Place a container beneath the engine

to catch the small quantity of coolant that will

be lost as the top hose is released.

Warning:If the engine is hot,

take precautions against

scalding.

5Slacken the air pump pivot and adjusting

link bolts, push the pump in toward the

engine, and slip the drivebelt off the two

pulleys.

6Feed the belt between the fan blades and

the radiator cowling at the top as the blades

are rotated. Now pull the belt out from

between the fan and radiator.

7Refitting the drivebelt is the reverse

sequence to removal, adjusting the tension as

described previously. Top up the cooling

system as described in “Weekly Checks” on

completion.

10 Clutch hydraulic check

1

1Check that the clutch pedal moves

smoothly and easily through its full travel, and

that the clutch itself functions correctly, with

no trace of slip or drag.

2Apply a few drops of light oil to the clutch

pedal pivot.

3From within the engine compartment check

the condition of the fluid lines and hoses.

Check for signs of fluid leaks around the slave

cylinder rubber boot or from the feed pipe and

hose. Apply a few drops of oil to the clutch

operating lever clevis pin and the pivot on the

flywheel housing.

11 Seats and seat belt check

1

1Check that the seats are securely attached

to the floor crossmember and that there is no

sign of corrosion anywhere near the

mountings. Check that the seats release and

then lock in place when the release

mechanism is operated.

2Check the seat belts for satisfactory

operation and condition. Inspect the webbing

for fraying and cuts. Check that they retract

smoothly and without binding into their reels.

3Check the seat belt mountings, ensuring

that all the bolts are securely tightened.

12 Headlight beam alignment

check

5

Accurate adjustment of the headlight beam

is only possible using optical beam-setting

equipment, and this work should therefore be

carried out by a Rover dealer or service

station with the necessary facilities.

Basic adjustments can be carried out in an

emergency, and further details are given in

Chapter 12.

1•12 Every 3000 miles or 3 months

8.8b Alternator mounting and adjustment points

1 Adjustment arm fixings

2 Securing nut and bolt (rear) 3 Securing nut and bolt (front)

8.9 The gap in the radiator shroud of early models (arrowed) to

allow removal and refitting of the fan belt

13 Engine/transmission oil and

filter renewal

2

1Frequent oil changes are the best

preventive maintenance the home mechanic

can give the engine, because ageing oil

becomes diluted and contaminated, which

leads to premature engine wear.

2Make sure that you have all the necessary

tools before you begin this procedure. You

should also have plenty of rags or newspapers

handy, for mopping up any spills. The oil

should preferably be changed when the

engine is still fully warmed-up to normal

operating temperature, just after a run; warm

oil and sludge will flow out more easily. Take

care, however, not to touch the exhaust or any

other hot parts of the engine when working

under the vehicle. To avoid any possibility of

scalding, and to protect yourself from possible

skin irritants and other harmful contaminants

in used engine oils, it is advisable to wear

gloves when carrying out this work. Access to

the underside of the vehicle is greatly

improved if the vehicle can be lifted on a hoist,

driven onto ramps, or supported by axle

stands. (see “Jacking and vehicle support”).

Whichever method is chosen, make sure that

the vehicle remains level, or if it is at an angle,

that the drain point is at the lowest point.

Oil draining

3Position the draining container under the

drain plug on the side of the transmission

casing, and unscrew the plug (see

illustration). If possible, try to keep the plug

pressed into the sump while unscrewing it by

hand the last couple of turns.

4Allow the oil to drain into the container (see

Haynes Hint), and check the condition of the

plug’s sealing washer; renew it if worn or

damaged. Also wipe off any metal particles

that may have accumulated on the magnet.

5Allow some time for the old oil to drain,

noting that it may be necessary to reposition

the container as the oil flow slows to a trickle;

when the oil has completely drained, wipe

clean the drain plug and its threads in the

transmission and refit the plug, tightening it to

the specified torque.

Oil filter renewal

6The oil filter is located underneath the

dynamo or alternator on the forward-facing

side of the engine. On early manual

transmission models the filter is of the

disposable cartridge type contained within an

aluminium bowl. On later models a throwaway

canister is used. All automatic transmission

models utilise the cartridge type filter. To

renew the filter proceed as follows.

Cartridge type

7Reposition the draining container under the

oil filter then undo and remove the long centre

bolt securing the bowl to the housing (see

illustration). On some models it may be

advantageous to remove the grille panel, as

space is rather limited.

8With the bolts released, carefully lift away

the filter bowl, which contains the filters and

will also be full of oil.

9Discard the old filter element but first make

sure that the metal pressure plate has not

stuck to the bottom of it. Now thoroughly

clean out the filter bowl, the bolt, and the

parts associated with it, using paraffin or a

suitable solvent (see illustration) Dry with a

lint free cloth

10 A rubber sealing ring is located in a

groove round the head of the filter housing

and forms an effective leak-proof joint

between the housing and the filter bowl. A

new rubber sealing ring is supplied with each

new filter element.

11 Carefully prise out the old sealing ring

from the locating groove. If the ring has

become hard and is difficult to move take

great care not to damage the sides of the

sealing ring groove.

12 With the old ring removed, fit the new ring

in the groove at four equidistant points and

press it home a segment at a time. Do not

insert the ring at just one point and work

round the groove pressing it home as, using

this method, it is easy to stretch the ring and

be left with a small loop of rubber which will

not fit into the locating groove (see

illustration).

13 Reassemble the oil filter assembly by first

passing up the bolt through the hole in the

bottom of the bowl, with a steel washer under

the bolt’s head and a rubber or felt washer on

top of the steel washer and next to the filter

bowl.

14 Slide the spring over the bolt followed by

the other steel washer, the remaining rubber

washer and finally the filter pressure plate

concave face downwards.

15 After fitting the new element to the bowl,

position the bowl on the rubber sealing ring

then insert and hand tighten the bolt. Before

finally tightening the centre bolt, ensure that

the lip of the filter bowl is resting squarely on

the rubber sealing ring and is not offset or

seated off the ring. If the bowl is not seating

properly, rotate it until it is. Run the engine

and check the bowl for leaks.

Every 6000 miles or 6 months 1•13

1

13.3 Engine/transmission oil drain plug

(arrowed)

13.7 Cartridge type oil filter and retaining

bolt as seen from below 13.12 Fitting a new cartridge type oil filter

sealing ring

13.9 Components of the cartridge type oil

filter

Keep the drain plug pressed into the

sump while unscrewing it by hand the

last couple of turns. As the plug

releases, move it away sharply so the

stream of oil issuing from the sump

runs into the container, not up your

sleeve!

Canister type

16 Reposition the draining container under

the oil filter then, using a suitable filter removal

tool if necessary, slacken the canister initially,

then unscrew it by hand the rest of the way;

be prepared for some oil spillage (see

illustration). Empty the oil in the old canister

into the container.

17 Using a clean, lint-free rag, wipe clean the

cylinder block around the filter housing.

Check the old canister to make sure that the

rubber sealing ring hasn’t stuck to the filter

housing; if it has, carefully remove it.

18 Apply a light coating of clean engine oil to

the sealing ring on the new canister. Screw

the canister into position on the housing until

it seats, then tighten it firmly by hand only - do

not use any tools.

19 Remove the old oil and all tools from

under the vehicle, then lower the vehicle to

the ground.

Oil filling

20 Remove the dipstick and the oil filler cap

from the engine. Fill the engine with oil, using

the correct grade and type of oil, (see

Specifications). Pour in half the specified

quantity of oil first, then wait a few minutes for

the oil to fall to the transmission casing. Take

care during this operation, particularly in cold

weather as it is all to easy to fill up the rocker

cover before the oil drains down into the

engine, with very messy results as it overflows

out of the filler neck. Continue adding oil a

small quantity at a time, until the level is up to

the lower mark on the dipstick. Adding

approximately 0.5 litres will raise the level to

the upper mark on the dipstick.

21 Start the engine. The oil pressure warning

light will take a few seconds to go out while

the new filter fills with oil; do not race the

engine while the light is on. Run the engine for

a few minutes, while checking for leaks

around the oil filter seal and the drain plug.

22 Switch off the engine, and wait a few

minutes for the oil to settle in the transmission

once more. With the new oil circulated and

the filter now completely full, recheck the level

on the dipstick, and add more oil as

necessary.

23 Dispose of the used engine oil safely and

in accordance with environmental regulations

(see “General repair procedures”).

14 Front brake wear check

1

Warning: The dust created by wear

of the shoes may contain asbestos,

which is a health hazard. Never

blow it out with compressed air,

and don’t inhale any of it. An approved filtering

mask should be worn when working on the

brakes. DO NOT use petrol or petroleum-

based solvents to clean brake parts; use brake

cleaner or methylated spirit only.

Drum brake models

1After high mileage the friction linings on the

brake shoes will have worn, and it will

therefore be necessary to fit replacement

shoes with new linings.

2Chock the rear wheels then jack up the

front of the car and support it on axle stands

(see “Jacking and vehicle support”). Remove

the front roadwheels.

3Slacken off the brake shoe adjuster(s) from

behind the backplate, and then undo and

remove the two brake drum retaining screws.

4Remove the brake drum from the wheel

hub. If the drum is tight, gently tap its

circumference with a soft-faced mallet.

5Brush and wipe away all traces of asbestos

dust from the brake shoes, wheel cylinders

and backplate, and also from the inner

circumference of the brake drum.

6Inspect the friction material and renew the

brake shoes as described in Chapter 9 if they

have worn down to less than the specified

minimum thickness.

7The brake shoes must also be renewed if

there is any sign of hydraulic fluid

contamination of the linings due to a leaking

brake wheel cylinder. If this is the case, the

cause of the leak must be traced and rectified

before fitting new brake shoes.

8Brake shoes should always be renewed as

complete sets (four shoes to a set), otherwise

uneven braking and pulling to one side may

occur.

9It is advisable to check that the brake wheel

cylinders are operating correctly before

proceeding further. To do this hold the brake

shoes in position using two screwdrivers while

an assistant very slowly depresses the brake

pedal slightly. Check that the wheel cylinder

pistons move out as the pedal is depressed,

and return when the pedal is released. If this is

not the case, it is quite likely that one of the

wheel cylinder pistons is seized and the cylinder

should therefore be renewed (Chapter 9).

10 Also check the condition of the brake

drum, If it is deeply scored on its inner

circumference it may be possible to have it

skimmed at an engineering works. If the

scoring is severe, renewal will be necessary

Disc brake models

11 Jack up the front or rear of the vehicle in

turn, and support it on axle stands (see

“Jacking and vehicle support”).

12 For better access to the brake calipers,

remove the roadwheels.

13 Look through the opening in the front of

the caliper, and check that the thickness of

the friction lining material on each of the pads

is not less than the recommended minimum

thickness given in the Specifications (see

Haynes Hint). If any one of the brake pads

has worn down to, or below, the specified

limit, all four pads must be renewed as a set

(ie all the front pads).

14 For a comprehensive check, the brake

pads should be removed and cleaned. The

operation of the brake calipers can then be

checked, and the brake discs can be fully

examined. Refer to Chapter 9 for details.

15 Driveshaft gaiter check

1

With the vehicle raised and securely

supported on stands (see “Jacking and

vehicle support”), turn the steering onto full

lock, then slowly rotate the roadwheel.

Inspect the condition of the outer constant

velocity (CV) joint rubber gaiters, squeezing

the gaiters to open out the folds. Check for

signs of cracking, splits or deterioration of the

rubber, which may allow the grease to

escape, and lead to water and grit entry into

the joint. Also check the security and

condition of the retaining clips. Repeat these

checks on the inner CV joints where offset

sphere type joints are fitted. If any damage or

deterioration is found, the gaiters should be

renewed as described in Chapter 8.

At the same time, check the general condition

of the CV joints themselves by first holding the

1•14 Every 6000 miles or 6 months

13.16 Canister type oil filter

1 Housing

2 Sealing ring 3 Filter

Look through the opening in the caliper

and check the thickness of the friction

lining material on the brake pads

driveshaft and attempting to rotate the wheel.

Repeat this check by holding the inner joint and

attempting to rotate the driveshaft. Any

appreciable movement indicates wear in the

joints, wear in the driveshaft splines, or a loose

driveshaft retaining nut.

16 Steering and suspension

lubrication

1

1Unlike most modern cars, there are a number

of steering and suspension joints on the Mini

which require regular attention. Provision for

lubrication of these joints is by means of a

grease nipple, to which a grease gun can be

engaged. The grease nipples are located in the

following areas (see illustrations):

a) Steering swivel hub; two nipples, one

upper and one lower on each side.

b) Upper suspension arm inner pivot; one

nipple on each arm.

c) Rear radius arm pivot; one nipple on each

pivot. Remove the rubber blanking plug to

expose the nipple on early models.

2When lubricating the front grease nipples it

is preferable to raise the front of the car and

support it on axle stands (see “Jacking and

vehicle support”) so that the load is taken off

the suspension. This will allow the grease to

penetrate into the joints more effectively. The

rear radius arm pivots can be lubricated with

the car on its roadwheels if wished.

3With the car raised and suitably supported,

wipe clean the area all round the grease

nipple and the nipple itself. Engage the head

of a grease gun, filled with the specified

grease, squarely onto the nipple, keeping it

pushed fully home. Operate the gun until

grease can be seen to appear from under the

dust cover over the joint or from around the

side of the pivot bushes.

4When lubricating the rear radius arm pivots, a

generous amount of grease will be needed each

side, quite a bit more than was required for the

front suspension joints. It probably won’t be

possible to tell when sufficient has been

applied, unless you look underneath at the inner

attachment on the subframe, it may be possible

to see it appear around the inner pivot; add a bit

more if in doubt .This is a vitally important area

on the Mini and it must be well lubricated.

5Although not actually part of the steering

and suspension, the handbrake cable guides

and the moving sectors on the rear subframe

should be lubricated at this time to ensure

smooth operation. There are no grease

nipples, so the grease should be applied with

a wooden spatula or similar tool to lubricate

these areas thoroughly.

17 Rear brake wear check

1

The procedure for checking the rear brake

components is the same as described in

Section 14 for models with drum brakes.

18 Underbonnet check for fluid

leaks and hose condition

1

General

1High temperatures in the engine

compartment can cause the deterioration of

the rubber and plastic hoses used for engine,

accessory and emission systems operation.

Periodic inspection should be made for

cracks, loose clamps, material hardening and

leaks.

2Carefully check the large top and bottom

radiator hoses, along with the other smaller-

diameter cooling system hoses and metal

pipes; do not forget the heater hoses/pipes

which run from the engine to the bulkhead.

Inspect each hose along its entire length,

replacing any that are cracked, swollen or

shows signs of deterioration. Cracks may

become more apparent if the hose is

squeezed (see Haynes Hint).

3Make sure that all hose connections are

tight. If the spring clamps that are used to

secure some of the hoses appear to be

slackening, they should be renewed to

prevent the possibility of leaks.

4Some other hoses are secured to their

fittings with screw type clips. Where screw

type clips are used, check to be sure they

haven’t slackened, allowing the hose to leak.

If clamps or screw type clips aren’t used,

make sure the hose has not expanded and/or

hardened where it slips over the fitting,

allowing it to leak.

5Check all fluid reservoirs, filler caps, drain

plugs and fittings etc, looking for any signs of

leakage of oil, transmission and/or brake

hydraulic fluid or coolant. If the vehicle is

regularly parked in the same place, close

inspection of the ground underneath it will

soon show any leaks. As soon as a leak is

detected, its source must be traced and

rectified. Where oil has been leaking for some

time, it is usually necessary to use a steam

cleaner, pressure washer or similar, to clean

away the accumulated dirt, so that the exact

source of the leak can be identified.

Vacuum hoses

6It’s quite common for vacuum hoses,

especially those in the emissions system, to

be numbered or colour-coded, or to be

identified by coloured stripes moulded into

them. Various systems require hoses with

different wall thicknesses, collapse resistance

and temperature resistance. When renewing

hoses, be sure the new ones are made of the

same material.

7Often the only effective way to check a

hose is to remove it completely from the

vehicle. If more than one hose is removed, be

sure to label the hoses and fittings to ensure

correct installation.

8When checking vacuum hoses, be sure to

include any plastic T-fittings in the check.

Every 6000 miles or 6 months 1•15

1

16.1a Lubricating the swivel hub upper

grease nipple . . . 16.1b . . . the upper suspension arm inner

pivot grease nipple . . . 16.1c . . . and the rear radius arm pivot

grease nipple

A leak in the cooling system will usually

show up as white or rust coloured

deposits on the area adjoining the leak

Inspect the fittings for cracks, and check the

hose where it fits over the fitting for distortion,

which could cause leakage.

9A small piece of vacuum hose can be used

as a stethoscope to detect vacuum leaks.

Hold one end of the hose to your ear, and

probe around vacuum hoses and fittings,

listening for the “hissing” sound characteristic

of a vacuum leak.

Warning: When probing with the

vacuum hose stethoscope, be

very careful not to come into

contact with moving engine

components such as the fan or fan belt.

Fuel hoses

Warning: Before carrying out the

following operation, refer to the

precautions given in “Safety

first!” at the beginning of this

manual, and follow them implicitly. Petrol

is a highly dangerous and volatile liquid,

and the precautions necessary when

handling it cannot be overstressed.

10 Check all fuel hoses for deterioration and

chafing. Check especially for cracks in areas

where the hose bends, and also just before

fittings, such as where a hose attaches to the

carburettor.

11 Spring-type clamps are commonly used

on fuel lines. These clamps often lose their

tension over a period of time, and can be

“sprung” during removal. Replace all spring-

type clamps with screw clips whenever a hose

is replaced.

Metal lines

12 Sections of metal piping are often used

for fuel line between the fuel tank, filter and

the engine. Check carefully to be sure the

piping has not been bent or crimped, and that

cracks have not started in the line.

13 If a section of metal fuel line must be

renewed, only seamless steel piping should

be used, since copper and aluminium piping

don’t have the strength necessary to

withstand normal engine vibration.

14 Check the metal brake lines where they

enter the master cylinder for cracks in the

lines or loose fittings. Any sign of brake fluid

leakage calls for an immediate and thorough

inspection of the brake system.

19 Fuel system components,

checks and lubrication

1

1Sparingly apply a few drops of light oil to the

throttle spindles, accelerator cable and the

pedal pivot. Similarly lubricate the exposed

ends of the choke cable (where fitted).

2Check that there is a small amount of

slackness in the cable so that the throttle linkage

closes fully with the accelerator pedal released.

Also check that full throttle can be obtained with

the accelerator pedal fully depressed.

3If there is any doubt about the cable

adjustment, refer to the relevant Parts of

Chapter 4 for the full adjustment procedure.

4On carburettor models, unscrew the piston

damper cap from the top of the carburettor

dashpot (see illustration). Top up the damper

with engine oil until the level is 13.0 mm above

the top of the hollow piston rod.

5Slowly push the damper back into the

piston and screw on the cap taking care not

to cross-thread it.

20 Contact breaker points

check and adjustment

3

Refer to Chapter 5B.

21 Distributor lubrication

1

1It is important that the distributor cam is

lightly lubricated with general purpose grease,

and that the contact breaker arm, centrifugal

advance weights and cam spindle are also

very lightly lubricated.

2Great care should be taken not to use too

much lubricant, as any excess that might find

its way onto the contact breaker points could

cause burning and misfiring.

3If an ignition shield is fitted over the front of

the engine, release the three plastic retaining

lugs and lift away the shield. Detach the two

spring clips or undo the two screws securing

the distributor cap to the distributor body and

lift off the cap.

4To gain access to the cam spindle, lift away

the rotor arm. Drop no more than two drops of

engine oil onto the felt pad or screw head (see

illustration). This will run down the spindle

when the engine is hot and lubricate the

bearings. The centrifugal advance weights

can be lubricated by dropping two or three

drops of engine oil through one of the holes or

slots in the distributor baseplate. No more

than one drop of oil should be applied to the

contact breaker arm pivot post.

5Refit the rotor arm, distributor cap and

ignition shield on completion.

22 Clutch return stop

adjustment

1

Note: As friction linings of the clutch disc wear,

the distance between the clutch release bearing

and the clutch thrust plate will decrease. The

pressure plate will then move in closer to the

clutch disc to compensate for wear. Unless the

wear is taken up by adjustment of the stop

located between the flywheel housing and the

1•16 Every 6000 miles or 6 months

19.4 Top up the piston damper on

carburettor models

21.4 Distributor lubrication points

1 Contact breaker cam

2 Contact breaker pivot post 3 Centrifugal weights lubrication point

4 Cam spindle

operating lever, the clutch will start to slip. On

later models fitted with the verto type clutch, the

assembly is self-adjusting and the following

procedure will not be necessary.

1To carry out the adjustment, first disconnect

the clutch operating lever return spring.

2Pull the operating lever away from the

engine until all the free play is eliminated.

3Hold the lever in this position and measure

the gap between the lever and the head of the

stop using feeler blades (see illustration).

4If necessary, slacken the locknut and adjust

the stop bolt until the specified gap is

achieved. Then tighten the locknut.

23 Dynamo check and

lubrication

1

Dynamo checks and lubrication consist

simply of checking the fan belt condition and

tension (Section 8) and adding a few drops of

engine oil to the dynamo rear bearing

lubricating hole.

24 Control box cleaning and

inspection

1

On dynamo equipped models, remove the

control box cover and check the cut-out and

regulator contacts. If they are dirty or rough or

burnt, place a piece of fine glasspaper (do not

use emery paper or carborundum paper)

between the cut-out contacts, close them

manually, and draw the glasspaper through

several times.

Clean the regulator contacts in exactly the

same way, but use emery or carborundum

paper and not glasspaper. Carefully clean

both sets of contacts from all traces of dust

with a rag moistened in methylated spirit. Refit

the cover on completion.

25 Ignition timing check and

adjustment

3

Refer to Chapter 5B.

26 Carburettor idle speed and

mixture adjustment

3

Refer to Chapter 4A.

27 Door, boot and bonnet

check and lubrication

1

1Check that the doors, bonnet and boot lid

close securely. Check that the bonnet safety

catch operates correctly. Check the operation

of the door check straps.

2Lubricate the hinges, door check straps,

the striker plates and the bonnet catch

sparingly with a little oil or grease.

3If any of the doors, bonnet or boot lid do not

close effectively or appear not to be flush with

the surrounding panels, carry out the adjustment

procedures contained in Chapter 11.

28 Bodywork, paint and exterior

trim check

1

1The best time to carry out this check is after

the car has been washed so that any surface

blemish or scratch will be clearly evident and

not hidden by a film of dirt.

2Starting at one front corner check the

paintwork all around the car, looking for minor

scratches or more serious dents. Check all

the trim and make sure that it is securely

attached over its entire length.

3Check the security of all door locks, door

mirrors, badges, bumpers, front grille and

wheel trim. Anything found loose, or in need of

further attention should be done with reference

to the relevant Chapters of this manual.

4Rectify any problems noticed with the

paintwork or body panels (see Chapter 11).

29 Road test

1

Check the operation and

performance of the braking

system

1Make sure that the vehicle does not pull to

one side when braking, and that the wheels

do not lock when braking hard.

2Check that there is no vibration through the

steering when braking.

3Check that the handbrake operates

correctly, without excessive movement of the

lever, and that it holds the vehicle stationary

on a slope.

4With the engine switched off, test the

operation of the brake servo unit (where fitted)

as follows. Depress the footbrake four or five

times to exhaust the vacuum, then start the

engine. As the engine starts, there should be a

noticeable “give” in the brake pedal as vacuum

builds up. Allow the engine to run for at least

two minutes, and then switch it off. If the brake

pedal is now depressed again, it should be

possible to detect a hiss from the servo as the

pedal is depressed. After about four or five

applications, no further hissing should be heard,

and the pedal should feel considerably harder.

Steering and suspension

5Check for any abnormalities in the steering,

suspension, handling or road “feel”.

6Drive the vehicle, and check that there are

no unusual vibrations or noises.

7Check that the steering feels positive, with

no excessive sloppiness or roughness, and

check for any suspension noises when

cornering and driving over bumps.

Drivetrain

8Check the performance of the engine,

transmission and driveline.

9Check that the engine starts correctly, both

when cold and when hot.

10 Listen for any unusual noises from the

engine and transmission.

11 Make sure that the engine runs smoothly

when idling, and that there is no hesitation

when accelerating.

12 On manual transmission models, check

that all gears can be engaged smoothly

without noise, and that the gear lever action is

not abnormally vague or “notchy”.

13 On automatic transmission models, make

sure that the drive seems smooth without

jerks or engine speed “flare-ups”. Check that

all the gear positions can be selected with the

vehicle at rest.

Clutch

14 Check that the clutch pedal moves

smoothly and easily through its full travel, and

that the clutch itself functions correctly, with

no trace of slip or drag. If the movement is

uneven or stiff in places, check the system

components with reference to Chapter 6.

Instruments and electrical

equipment

15 Check the operation of all instruments

and electrical equipment.

16 Make sure that all instruments read

correctly, and switch on all electrical

equipment in turn, to check that it functions

properly.

17 Test the operation of the brake failure

warning system (where fitted) by pressing the

test switch located next to the heated rear

window switch. When pressed, the switch

should light and go out when released.

18 If the light should come on when driving,

the brake fluid level should be checked (and

topped up, if necessary), as soon as possible.

Every 6000 miles or 6 months 1•17

1

22.3 Using feeler blades to measure the

clutch return stop clearance

30.13b Lift off the lid and remove the

element

30 Air cleaner element renewal

1

Carburettor models except

Cooper S

1On models with an air intake duct over the

top of the engine, unscrew the two nuts

securing the duct to the rocker cover studs.

Release the clip and disconnect the duct from

the air cleaner body.

2Undo and remove the single wing nut and

washer on early models, or the twin wing bolts

and washers on later models, securing the air

cleaner to the carburettor

3If the air cleaner is retained by a single wing

nut lift off the air cleaner top cover. Detach the

rocker cover hose, then lift the air cleaner

body off the carburettor, tip it up at the front

and slide it sideways until it is clear of the long

retaining stud and can be lifted away. Recover

the sealing ring.

4If the air cleaner is retained by two wing

nuts, detach the hot air duct (where fitted) and

then lift the air cleaner body off the

carburettor.

5With the air cleaner removed from the

engine, recover the rubber sealing ring if it

stayed behind on the carburettor flange.

6Lift off the air cleaner cover and withdraw

the paper element. On the later type moulded

plastic air cleaners the cover is removed by

prising it off with a screwdriver inserted in the

slots on the periphery of the cover (see

illustrations).

7Thoroughly clean the inside of the air

cleaner body.

8Refit the air cleaner and element using a

reverse of the removal procedure. Make sure

that where an alignment arrow is stamped on

the top cover, it is pointing toward the

location lug on the air cleaner body (see

illustration). Ensure also that the rubber

sealing ring is in position before refitting the

air cleaner.

9If the air cleaner body incorporates an

adjustable air intake spout, this should be

positioned adjacent to the exhaust manifold in

winter and away from it in summer.

Cooper S carburettor models

10 Undo and remove the two wing bolts and

washers and lift off the air cleaner top cover.

Lift out the paper elements and thoroughly

clean the inside of the air cleaner body.

11 The air cleaner body may be removed if

necessary after disconnecting the engine

breather pipe and the throttle return spring.

Take care not to lose the two rubber sealing

washers from the carburettor flanges.

12 Refitting the air cleaner and elements is

the reverse of the removal procedure.

Fuel injection models

13 Release the four retaining clips, then

slacken and remove the three screws

securing the air cleaner assembly to the

throttle body, and lift off the air cleaner lid.

Remove the filter element (see illustrations).

14 Wipe the body of the air cleaner clean,

then fit the new element, ensuring that it is

correctly seated.

15 Refit the air cleaner lid, and secure it in

position with the retaining screws (tightening

them securely) and clips.

31 Valve clearance adjustment

2

Refer to Chapter 2A.

32 Distributor cap, rotor arm

and HT lead check

1

Warning: Voltages produced by

an electronic ignition system are

considerably higher than those

produced by conventional

ignition systems. Extreme care must be

taken when working on the system if the

ignition is switched on. Persons with

surgically-implanted cardiac pacemaker

devices should keep well clear of the

ignition circuits, components and test

equipment.

1The spark plug (HT) leads should be

inspected one at a time, to prevent mixing up

the firing order, which is essential for proper

engine operation. Gain access to the leads

and disconnect them as described for the

spark plug check and renewal.

2Check inside the boot for corrosion, which

will look like a white crusty powder. Clean this

off as much as possible; if it is excessive, or if

cleaning leaves the metal connector too badly

corroded to be fit for further use, the lead

must be renewed. Push the lead and boot

back onto the end of the spark plug. The boot

should fit tightly onto the end of the plug - if it

doesn’t, remove the lead and use pliers

carefully to crimp the metal connector inside

the boot until the fit is snug.

3Using a clean rag, wipe the entire length of

the lead to remove built-up dirt and grease.

1•18 Every 12 000 miles or 12 months

30.6b . . . and lift out the element30.6a Prise off the later type air cleaner

moulded plastic cover . . .

30.8 Make sure the alignment arrow is

toward the lug on the air cleaner body 30.13a On fuel injection models, release

the clips (three arrowed) and remove the

screws

Once the lead is clean, check for burns,

cracks and other damage. Do not bend the

lead sharply, because the conductor might

break.

4Inspect the remaining spark plug (HT)

leads, ensuring that each is securely fastened

at the distributor cap and spark plug when the

check is complete. If any sign of arcing,

severe connector corrosion, burns, cracks or

other damage is noticed, obtain new spark

plug (HT) leads, renewing them as a set.

5Spring back the retaining clips or undo the

two screws and remove the distributor cap.

Thoroughly clean it inside and out with a dry

lint-free rag.

6Examine the HT lead segments inside the

cap. If they appear badly burned or pitted

renew the cap. Also check the carbon brush

in the centre of the cap, ensuring that it is free

to move and stands proud of its holder. Make

sure that there are no signs of cracks or black

“tracking” lines running down the inside of the

cap, which will also mean renewal if evident.

7Inspect the rotor arm checking it for

security and also for signs of deterioration as

described above.

8Refit the distributor cap on completion.

33 Spark plug renewal

1

1It is vital for the correct running, full

performance and proper economy of the

engine that the spark plugs perform with

maximum efficiency. The most important

factor in ensuring this, is that the plugs fitted

are appropriate for the engine (a suitable type

is specified at the end of this Chapter). If this

type is used and the engine is in good

condition, the spark plugs should not need

attention between scheduled renewal

intervals. Spark plug cleaning is rarely

necessary, and should not be attempted

unless specialised equipment is available, as

damage can easily be caused to the firing

ends.

2Spark plug removal and refitting requires a

spark plug socket, with an extension which

can be turned by a ratchet handle or similar.

This socket is lined with a rubber sleeve, to

protect the porcelain insulator of the spark

plug, and to hold the plug while you insert it

into the spark plug hole. You will also need a

wire-type feeler gauge, to check and adjust

the spark plug electrode gap, and a torque

wrench to tighten the new plugs to the

specified torque.

3To remove the spark plugs, open the

bonnet, where fitted, release the three plastic

retaining lugs and lift the ignition shield off the

front of the engine

4If the marks on the original-equipment HT

leads cannot be seen, mark the leads 1 to 4,

to correspond to the cylinder the lead serves.

5Pull the leads from the plugs by gripping

the rubber boot, not the lead, otherwise the

lead connection may be fractured (see

illustration).

6Unscrew the spark plugs, ensuring that the

socket is kept in alignment with each plug - if

the socket is forcibly moved to either side, the

porcelain top of the plug may be broken off. If

any undue difficulty is encountered when

unscrewing any of the spark plugs, carefully

check the cylinder head threads and sealing

surfaces for signs of wear, excessive

corrosion or damage; if any of these

conditions is found, seek the advice of a

dealer as to the best method of repair.

7As each plug is removed, examine it as

follows - this will give a good indication of the

condition of the engine. If the insulator nose of

the spark plug is clean and white, with no

deposits, this is indicative of a weak mixture.

8If the tip and insulator nose are covered

with hard black-looking deposits, then this is

indicative that the mixture is too rich. Should

the plug be black and oily, then it is likely that

the engine is fairly worn, as well as the mixture

being too rich.

9If the insulator nose is covered with light tan

to greyish-brown deposits, then the mixture is

correct, and it is likely that the engine is in

good condition.

10 The spark plug electrode gap is of

considerable importance as, if it is too large or

too small, the size of the spark and its

efficiency will be seriously impaired. The gap

should be set to the value given in the

Specifications.

11 To set the electrode gap, measure the

gap with a feeler blade or adjusting tool, and

then bend open, or closed, the outer plug

electrode until the correct gap is achieved

(see illustration). The centre electrode should

never be bent, as this may crack the insulation

and cause plug failure, if nothing worse. If the

outer electrode is not exactly over the centre

electrode, bend it gently to align them.

12 Before fitting the spark plugs, check that

the threaded connector sleeves at the top of

the plugs are tight, and that the plug exterior

surfaces and threads are clean (see Haynes

Hint).

13 On installing the spark plugs, first check

that the cylinder head thread and sealing

surface are as clean as possible; use a clean

rag wrapped around a paintbrush to wipe

clean the sealing surface. Ensure that the

spark plug threads are clean and dry then

screw them in by hand where possible. Take

extra care to enter the plug threads correctly.

14 When each spark plug is started correctly

on its threads, screw it down until it just seats

lightly, then tighten it to the specified torque

wrench setting.

15 Reconnect the HT leads in their correct

order, using a twisting motion on the boot

until it is firmly seated. Finally, refit the ignition

shield.

Every 12 000 miles or 12 months 1•19

1

33.5 Pull the leads off the spark plugs by

gripping the rubber boot 33.11 Adjusting a spark plug electrode

gap

It is very often difficult to insert spark

plugs into their holes without cross-

threading them. To avoid this

possibility, fit a short length of 5/16 inch

internal diameter rubber hose over the

end of the spark plug. The flexible hose

acts as a universal joint to help align

the plug with the plug hole. Should the

plug begin to cross-thread, the hose

will slip on the spark plug, preventing

thread damage to the aluminium

cylinder head

If new spark plug leads are

to be fitted, remove the

leads one at a time and fit

each new lead in exactly the

same position as the old one.

Page is loading ...

Mini COOPER S Workshop Manual

Mini COOPER S Workshop Manual

Other documents